<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>扩展运算符</title>
</head>
<p>拓展运算符（...）用于取出参数对象所有可遍历属性然后拷贝到当前对象</p>
<body>
<script>
    let user = {name:"张三",age:134};
    // 对象复制
    let renkang = {...user}; // 相当于 let renkang = {name:"张三",age:134}
    console.log(renkang);

    // 对象的属性合并
    let hobby = "girl";
    let renkang2 = {...user,hobby};
    // let renkang2 = {...user,hobby,address:"郑州"};
    console.log(renkang2);

    // ... 可以和解构数组组合属性
    let  arr = [1,2,3,4,5];
    let [x,y,...z] = arr;
    // x = 1, y = 2, z=[3,4,5]
    console.log(x,y,z);
</script>
</body>
</html>